• Fixed issue where Ipopt exceptions could not been caught from other libraries on macOS with clang when Ipopt or the other library was build with -fvisibility=hidden.
• Call MPI_Init() with NULL instead of dummy arguments to fix SIGSEGV with MPICH >= 4.3.1 [#846, by Shengqi Chen].
• Fixed a use-after-free in Spral interface where attempting to solve a second system with the same structurally singular matrix would end up trying to use an old numeric factorization using data from an already freed symbolic factorization [#848, by Kevin Kofler].
• Fixed that the limit on filter resets was not effective [#860, #862, by Lander Vanroye and Julien Schueller]. To restore previous behavior, set option max_filter_resets to an high value.
• Removed unnecessary include of iostream header [#856 by Jeremy Nimmer, #863].
• Removed global variable Wallclock_firstCall_ (for #857). WallclockTime() now returns time since the Epoch instead of the first call.
• Global variable copyright_message_printed is now thread-local (for #857). The copyright message will be printed once per thread now.